Flora of North America species comparison

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Hieracium albiflorum

white hawkweed, white-flower hawkweed
Habit Plants 15–40(–90) cm.
Stems

proximally usually piloso-hirsute (hairs 1–6+ mm), rarely glabrous, distally glabrous.
Leaves

basal (0–)3–8+, cauline 1–5(–12+);

blades oblanceolate, 40–100(–300) × 12–30(–60+) mm, lengths 3–5+ times widths, bases cuneate, margins usually entire, sometimes sinuately toothed, apices obtuse to acute, faces piloso-hirsute (hairs 1–6 mm), rarely glabrous.
Peduncles

usually glabrous, sometimes stipitate-glandular.
Involucres

± campanulate, (7–)8–10(–11) mm.
Florets

(6–)12–25+;

corollas yellow, 9–10 mm.
Phyllaries

8–13+, apices acuminate, abaxial faces piloso-hirsute (hairs 1–2+ mm), stellate-pubescent, and stipitate-glandular.
Calyculi

bractlets 5–12+.
Heads

(3–)12–50+ in corymbiform to paniculiform arrays.
Cypselae

columnar, 2.5–4 mm;

pappi of 30–40+, stramineous bristles in ± 2 series, (4–)5–7 mm.

Hieracium albiflorum
Phenology Flowering (May–)Jun–Sep.
Habitat Chaparral, conifer forests, meadows, stream beds, serpentines, volcanics, around mineral springs
Elevation 10–2900 m (0–9500 ft)
Distribution
from FNA
AK; CA; CO; ID; MT; NV; OR; SD; UT; WA; WI; WY; AB; BC; NT; QC; SK; Mexico (Chihuahua, Sonora)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 292.
Parent taxa Asteraceae > tribe Cichorieae > Hieracium
Sibling taxa
H. abscissum, H. alpinum, H. argutum, H. aurantiacum, H. bolanderi, H. brevipilum, H. caespitosum, H. carneum, H. crepidispermum, H. fendleri, H. flagellare, H. greenei, H. gronovii, H. horridum, H. lactucella, H. longiberbe, H. longipilum, H. megacephalon, H. murorum, H. nudicaule, H. paniculatum, H. parryi, H. pilosella, H. piloselloides, H. pringlei, H. robinsonii, H. sabaudum, H. scabrum, H. schultzii, H. scouleri, H. traillii, H. triste, H. umbellatum, H. venosum, H. vulgatum
Synonyms Chlorocrepis albiflora
Name authority Hooker: Fl. Bor.-Amer. 1: 298. (1833)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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